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Finding the Fourth Proportional to 118,555.89, 177,636.39 and 83,421.73

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Solution

The fourth proportional to 118,555.89, 177,636.39 and 83,421.73 is: 124,993.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,555.89 : 177,636.39 = 83,421.73 : x
  2. Step 2: Convert to fraction form
    118,555.89/177,636.39 = 83,421.73/x
  3. Step 3: Cross multiply
    118,555.89x = 177,636.39 × 83,421.73
  4. Step 4: Simplify right side
    118,555.89x = 14,818,734,964.75
  5. Step 5: Solve for x
    x = 14,818,734,964.75/118,555.89
  6. Step 6: Final answer
    x = 124,993.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.